But then is a commonly used phrase that denotes a contrast between two clauses or ideas. Sometimes, using the same words over and over again can become monotonous and repetitive. Hence, it is essential to have synonyms for but then at hand. Instead of but then, one can use words like however, nevertheless, nonetheless, still, yet, although, even though, in spite of that, and despite that. These words all signify a transition to a contrasting thought or idea in a sentence. By incorporating these synonyms for but then, your writing will become more diverse and engaging, making for a more enjoyable experience for both the writer and reader.